I am getting pulse fence RFI about a burst per second. I can take it out the rfi with NB on HF bands and it seems worse on some frequencies. My problem is the fence's signal over powers some of the repeater signals on VHF and UHF unless they are very strong signals. It gives a chopping sensation on the receive repeater signal. The fence is necessary to keep the cows in out here but is there some type of external noise blanker or a way to minimize the fence signal?